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PrimePalindromes

import os



def primepalindromes(upper):

  samplesfile=open("primes.txt","wt")

  primestring="Palindromic Primes between 1 and "+str(upper)+"\n"

  for n in range(1,upper,2):

    printNow(n)

    if ((len(str(n)))%2)>0 and palindromecheck(n)==1 and primecheck(n)==1:

      primestring=primestring+str(n)+"\n"

  samplesfile.write(primestring)

  samplesfile.close()

      

def primecheck(x):

  for n in range (2,(int(sqrt(x)))+1):

    if x%n==0:

      return 0

  return 1

     

def palindromecheck(x):

  numstring=str(x)

  if numstring==mirrorstring(x):

    return 1

  return 0

  

def mirrorstring(string):

    string=str(string)

    mirrorpoint= int(len(string)/2)

    mstring= string[0:mirrorpoint]

    reversestring= string[mirrorpoint-1::-1]

    return mstring +string[mirrorpoint]+ reversestring

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• Fall 2003 Soapbox last edited on 29 January 2006 at 9:48 pm by r80h18.res.gatech.edu